Sport psychology is about learning to think in the most effective and efficient way possible. In golf this applies to a way of consistently thinking and playing under the fire of competitive pressure. The role of a golf caddy, remote-controlled or electric golf trolley is to free a golfer of the challenges of carrying their golf equipment around the golf course, thereby helping them to control their thoughts and be more consistent in lowering their scores (the fact that we never see a professional golfer carrying their golf equipment should be proof enough).